Cylinder printing-machine.



H. M. BARBER.

CYLINDER PRINTING MACHINE.

APPLICATION FILED SEPT. 16, 1909.

1 89,740, Patented Mar. 10, 19M

3 SHEETS-SHEET 1.

H. M. BARBER.

CYLINDER PRINTING MACHINE.

APPLICATION FILED SEPT. 16, 1909.

Patented Mar. 10, 19M

3 SHEETS-SHEET 2.

H. M. BARBER.

CYLINDER PRINTING MACHINE.

APPLICATION FILED SEPT. 16, 1909.

Patented Mar. 10, 1914 a saints-sum a.

Inbezzbn- UNITED STATES ATENT OFFICE.

HOWARD M. BARBER, OF STONINGTON, CONNECTICUT, ASSIGNOR T C. B. COTTRELL & SONS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

CYLINDER PRINTING-MACHINE.

Specification of Lettcrs Patent.

Patented Mar. 10, 1914.

Application filed September 16, 1909. Serial No. 518,003.

To (ZZZ whom it may concern:

Be it known that I, HOWARD M. BARBER,

a citizen of the United States, and resident of Stonington in the county of New London c linder printing machines and has foritsv object to provide novel means for 'IZLlSll'lg.

and lowering the impression cylinder whereby the impression cylinder may be held rigidly under any printing strain and there'- by improve the quality of work produced by the press. l

My invention further consists 111 certaln improvements in the construction, form and arrangement of the several parts of the mechanism for raising and lowering the impression cylinder whereby the objects above set forth ma be accomplished by a very simple and e cctive mechanism.

My invention is herein shown and de-.

scribed in connectionwith a two-revolution rotary cylinder printing machine but it-is applied to cylinder printing machines of other" forms with equal facility and without departing from the spiritand scope of the invention. v

In the accompanying" drawings, Figure 1 represents in side elevation a portion of a two-revolution rotary cylinder rinting mainvention applied thereto, Fig.2 is a ongitudinal vertical section through the same taken adjacent to one of the side frames, Fig. 3 is a detail longitudinal vertical section showing the impression c linder and portions of the form cylinder, t e feeding table and the stripping fingers of the sheet delivery mechanism, Fig. 4 is a detail horizontal section showing the rotary cam and its adjacent arts, Fig. 5 is a v section-taken in the plane 0 the line A-A of Fig. 4 looking in the direction of the arrows, Fig. 6 is a detail section through one of the impression cylinder shaft journal boxes and its adjacent parts, and Fig. 7 is a section taken n the plane of theline BB of Fig. 6 through bot-h of the impression cylinder s aft journal boxes.

impression cylinder shaft The side frames of the machine are de-- noted by 1 andthe usual feeding table by 2. i"

The impression cylinder 3 is provided with the usual grippers 4 arranged to take the sheets to be printed from the feed table 2 and transfer them to the delivery mecha 'nism. The usual stripping fingers of the delivery mechanism are denoted by 5 and are arranged to strip the sheets from the impression cylinder.

The form cylinder is denoted by 6. The

impressionand form cylinder shafts are denoted by 7 and 8 respectivelv and their journal boxes by 9 and 10. 'The boxes 10 for the form cylinder shaft-8 are mounted stationarv in the side frames 1 of the machine and the journal boxe 9 for the shaft 7 of the impression cylinder-are slidably mounted in the said side frames 1. I

-The means for raising and depressing the impression cylinder are as follows :A rock shaft 11 is mounted in suitable bearings in. the side-frames 1, which shaft has fixed thereto arms 12, 13. Rock shafts 14, 15, are mounted in caps 16, 17, over the journal boxes 9, which shafts are provided with cams for forcing the boxes 9 and thereby the cylinder 3 toward the form cylinder 6. In the present instance, these cams are shown as eccentrics 18, 19, provided with rollers 20, 21. Adjustable posed betweenth'e roller boxes 9 for accurately adjusting the position of the boxes with respect to the eccentric cams 18, 19. These gibs 22 are adjusted by any suitable means, such, for instance, as providing for each gib a screw 23 secured to the box 9; an adjusting nut 24 on the screw engaging the gib and a lock nut 25 also on the screw for locking the adjusting nut 24 in position. The rock shafts 14, 15, are provided with arms 26, 27 fixed thereto and -the free ends of these arms 26, 27, are connected to the free ends of the arms 12, 13, of the rock shaft 11 by rods 28, 29.

The rotary cam shaft 30 is provided with a gibs' 22 are inter- 20, 21, and the box cam 31, the groove 32'of which is adapt ed to receive a-roller 33 of a cam slide 34.

providing the slide with an elongated slot through which extends the pin 36 of the gab hook arm 37 fixed to the rocksh-aft 11. The cam slide 3-1 is also slidably mounted upon the cam shaft 30. A gab hook 38 is pivoted at 39 on the slide 34, which hook removably engages tne pin 3(3 on the gab hook arm 37 for rocking the arm and thereby the shaft 11 as the cam slide 34 ismoved back and forth by the rotary movement of the cam 31. I

- Manually controlled means are provided for disconnecting the gab hook 38 from the arm 37 at pleasure, as follows: A rock shaft 40 is mounted in one of the side frames 1, which rock shaft has fixed thereto oppositely extended arms, 41, 42. The arm 41 is provided with a laterally extended lug 43 located beneath the weighted extension 44 of the gab hook 38. The arm 42 is provided with an uprising arm 45 projecting through the floor or platform 46 and provided with a foot piece 47. The depression of this foot piece 47 will raise the arm 41 and thereby lift the gab hook 38 out of engagement with the pin 36 of the arm37. r

The impression cylinder 3 is yieldingly held at the limit of its upward movement away from the form cylinder 6 by spring means of the required pressure. 11 the present instance, two pairs of springs 48, 49, are interposed between shoulders 50 on the side frames 1 and adjusting nuts 51 on the screw threaded portions ofpins 52, the heads of which pins bear against the under sides of the boxes 9 and the shafts of which pins are guided in the side frames 1. In operation, in the accompa'nyingdrawings, the impression cylinder is shown in its raised position under the influence of the lifting springs 48, 49, with its grippers closed upon a sheet fed from the feeding table 2. After the impression cylinder grippers have seized the advance edge of the sheet, the rotary movement of the cam 31 will bring its groove 32 in position to start the cam slide 34 on its inward movement. Because of the connection between the gab hook 38 and the arm 37 this inward movement of the cam slide 34 will rock the arm 37 and thereby the rock shaft 11 in a direction to swing the arms 12, 13, and thereby the arms 26, 27, downwardly thus causing the eccentric cams 18, 19, to force the boxes 9 of the impression cylinder shaft 7 downwardly for bringing the form and impres sion 0 linders into printing contact just before t ie sheet is brought by the grippers on the impression cylinder into position for receiving its printing impression. The cam groove 32 is so shaped that after the rear end of the sheet has passed the printing point, the rock shaft 11 will be moved back to its original position thus permitting the lifting springs 48, 49, to exert their pressure to lift the impression cylinder away from the form cylinder. This is accomplished be fore the grippers come for a second time to the point of contact between the form and impression. cylinders so that during the secondrevolution of the impression cylinder while'the printing sheet is being taken off by the delivery mechanism, the impression cylinder will be lifted away fromthe form cylinder and held in such position by the lifting springs.

If, for anyreason, after a sheet has been seized by the grippers, it is desired to pre vent the sheet from receiving an impression, the operator may prevent thevdepression of the impression cylinder by lifting the gab hook 38 out of its engagement with the arm 37, through the depression of the foot iece 47, thus disconnecting the cam slide rom the rock shaft 11 The weighted extension 44 of the gab hook 38 will cause the gab hook when released to fall by-gravity into engagement with the pin 36 on the arm 37.

The gibs 22 carried by the journal boxes 9 may be adjusted for changing the impression pressure or thermore the nuts 51 may be adjusted for changing the lifting pressure.

By the use of the mechanism constructed,

arranged and operatettas herein set forth,

it will be seen that the lifting pressure is applied directly to the impression cylinder shaft journal boxes and that also the means for forcing the cylinder downwardly is also applied directly to the said journal boxes thus doing away with intermediate parts and also insuring an absolutely rigid support for the impression cylinder during its printing operation. It will, -furthermore, be seen that a very simple arrangement is provided for disconnecting the cam fromthe impression cylinder operating means when so desired.

\Vhat I claim is 1. An impression cylinder, its journal boxes, their liftingsprings depressing cams lly operating the and means for automatica depressing cams at predetermined intervals com rising cam shafts, their arms, a rock sha t, its arms, rods connecting the corresponding arms of said shafts, a rotary cam, its slide, a gab gab hook arms carried by the rock shaft and engaged by said gab hook.

i 2. An im ression cylinder, its journal boxes, their ifting springs depressing cams and means for automatically operating the depressing cams at predetermined intervals comprising cam shafts, their arms, a rock shaft, its arms, rods connecting the correhook carried thereby and sponding arms of said shafts, a rotary cam, its my invention, I have signed m name in 1ts shde, a gab hook carried thereby, gab presence of two witnesses, this ourteenth hook arms carried by the rock shaft and enday of September A. D. 1909.

ga%'ed by said gab hook, and a manually con- HOWARD M. BARBER. 5 tro led device for disconnecting the gab Witnesses:

hook 'and gab hook arm at pleasure. A. R. STILLMAN,

In testimony that I claim the foregoing G. DENDICK. 

